# Magnetic fields of AGB and post-AGB stars

## TL;DR

This paper reviews magnetic field observations in AGB and post-AGB stars, discusses their potential origins and roles, and highlights recent findings suggesting intrinsic magnetic activity and rotation in these evolved stars.

## Contribution

It provides an updated overview of magnetic field measurements and explores the possible intrinsic origins of magnetic fields in AGB stars, including recent observational evidence.

## Key findings

- Magnetic fields are present in AGB and post-AGB star envelopes.
- Recent observations suggest intrinsic magnetic activity and rotation.
- Magnetically aligned dust detected around a supergiant star.

## Abstract

There is ample evidence for strong magnetic fields in the envelopes of (Post-)Asymptotic Giant Branch (AGB) stars as well as supergiant stars. The origin and role of these fields are still unclear. This paper updates the current status of magnetic field observations around AGB, post-AGB stars and describes their possible role during these stages of evolution. The discovery of magnetically aligned dust around a supergiant star is also highlighted. In our search for the origin of the magnetic fields, recent observations show the signatures of possible magnetic activity and rotation, indicating that the magnetic fields might be intrinsic to the AGB stars.